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  <title>返回符号连接指向的目标</title>
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  <div id="layout-content"><div id="function.readlink" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">readlink</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">readlink</span> &mdash; <span class="dc-title">返回符号连接指向的目标</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.readlink-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>readlink</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$path</code></span>): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>readlink()</strong></span> 和同名的 C
   函数做同样的事，返回符号连接的内容。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.readlink-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">path</code></dt>

     <dd>

      <p class="para">
       链接符号的路径。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.readlink-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回链接的路径内容，出错则返回 <strong><code>false</code></strong>。
  </p>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <span class="simpara">
    如果 <code class="parameter">path</code> 不是符号链接，则该函数将失败，但在 Windows
    上除外，其中将返回规范化的路径。
   </span>
  </p></blockquote>
 </div>


 <div class="refsect1 examples" id="refsect1-function.readlink-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2218">
    <p><strong>示例 #1 <span class="function"><strong>readlink()</strong></span> 示例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br /></span><span style="color: #FF8000">//&nbsp;output&nbsp;e.g.&nbsp;/boot/vmlinux-2.4.20-xfs<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">readlink</span><span style="color: #007700">(</span><span style="color: #DD0000">'/vmlinuz'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.readlink-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.is-link.html" class="function" rel="rdfs-seeAlso">is_link()</a> - 判断给定文件名是否为一个符号连接</span></li>
    <li class="member"><span class="function"><a href="function.symlink.html" class="function" rel="rdfs-seeAlso">symlink()</a> - 建立符号连接</span></li>
    <li class="member"><span class="function"><a href="function.linkinfo.html" class="function" rel="rdfs-seeAlso">linkinfo()</a> - 获取一个连接的信息</span></li>
   </ul>
  </p>
 </div>


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